Pump



on an JOHN' B. SPERRY, OF AURORA., LLINOIS, ASSGNOR TO ''-E AMERICSN WELL llil'ORS, OF AURORA, ILLINOIIIS, A CORPORATION O1? ILLNOS.

PUMP.

Specification of Letters latent.

Patented May 31, 19210 17 7o all 'whom z' may concern Be it known that l, JOHN B. Srnnnr, a citizen of the United States, and a resident of Aurora, in the countyot Kane and State of illinois, have invented certain new and useful lmprovements in :Pumps7 of which the following is a specication, reference being had to the accompanying drawings.

lThis invention relates to improvements in deep well pumps of the type employing two plungers, the two rods connected respectively with the plungers being located one within the other and being adapted to be separately reciprocated and preferably in such manner that theupward stroke of each plunger will be caused to begin before the other plunger has quite reached its uppermost position. 1t is the principal object of this invention to provide improved means for insuring the maintenance at all times of a water-tight joint at each of the'bearings for the inner one of the reciprocating plunger-rods. lt is of the greatest importance that such joints be so maintained tor in the event of admission of water to the interior of the outer hollow rod the water so admitted will surge up and down during the pumping operation and seriously reduce the efficiency ot' the pump. Briefly stated, l accomplish the above-named object by securing opposite the joints between the sections of pipe that constitute Vthe outer plunger-rod a packing box that forms a bearing' for the inner rod, and providing means for so connecting together the several sections of the inner rod in a manner different from that employed in connecting together the several sections of the outer hollow rod that any tendency of either rod to turn axially will be effectively counteracted by the other rod, with the result that the packing-boxes and the packing material held by them around and against the inner rod cannot be disturbed. lt is further an obj ect of the invention to pr-ovide a construction that in addition to furnishing perfectly maintained bearings for the inner plunger-rod will provide eiective means for retaining within the outer tubular rod the desired quantity of hard grease or other lubricant employed tor lubricating the rods; and to improve generally the construct-ion and operation of pumping means of this general character.

These objects are attained by the constructions and arrangements of parts shown in the drawings and hereinafter described.

1n the drawings Figure 1 is a vertical central section through portions of a pump cylinder anda portion of the main supporting pipe at the upper end thereof, the view showing also the upper one of the plungers and the two plunger-rods; and

Fig. 2 is a similar view showing a portion of the pump cylinder that extends below that part of the cylinder shown in Fig. 1. ln this said lower portion is shown the lower plunger and a portion of its actuating rod.

Referring to the drawings,10 indicates the lower portion of a pipe which toi-ms the main support for the pump cylinder. s will be understood, it is to be supported with its upper end at or near the surface of the ground and provided with a lateral discharge for the water being pumped. 11 indicates the pump cylinder scoured to the open lower end ot the supporting' pipe 10 by a screw-threaded coupling 12. 13 indicates a plunger movable within the cylinder 11 and provided with a suitable packing 14; as usual. rllhis plunger 13 is the upper one of the two that are employed and it is carried at the lower end of a hollow plunger-rod indicated by 15. As shown, the connection of the plunger 13 to its said rod is made through the medium oi a coupling 16 which is screwed upon the upper en d of a sleeve 17 formed with and rising from the plunger 13 and into which coupling the threaded lower end of the hollow rod 15 is screwed. rllhis coupling. in the construction shown. has a right-hand thread and the object in so making it will be described later on. rlhe valve that controls the water passage through this plunger is indicated by 18. 1t is movably mounted on the sleeve 17 and is held to its seat by a spring 19 that abuts at its upper end against the lower `tace ot the coupling 16. The hollow rod 15 will he made up of a plurality oi sections secured.

particularly Y together by suitable couplings each having a right-hand screw thread as in the case of the coupling 16. One of such couplings is shown in Fig. 1 and indicated by 20. 21 indicates a packing-box provided at one end with an annular flange 22 that extends out so as to tit between the ends of two sections of the hollow plunger-rod 15 -and thus hold the packing box firmly and centrally of the vmi hollow rod when the sections of said rod are iirmly screwed together by the coupling 20. 23 indicates a gland screwed into the packing-box to hold a suitable packing 24 around the other plunger-rod.

Such other plunger-rod is partly cylindrical and partly angular in cross-section,

the former portion being indicated by 25 and the angular part by 25. It is cylindrical throughout the greater portion of its length and hence reciprocates freely in its bearings furnished by the cylindrically-` bored packing boxes 21. The angular portion 25a is at the lower end of the rod and passes through and is reciprocatable in the correspondingly shaped opening in the .upper plunger 18 and its attached sleeve 17.

Such angular portion 25 will bemade of suiicient length to always remain in its bearing in the plunger during the full length of the stroke of the plungers. The rod 25-25a is preferably made solid, as shown. The lower end of the angular portion 252L is connected to the lower plunger 26,

the connection in the construction shown rbeing by means of a threaded shank formed with such member 25a, such shank entering a threaded socket formed in a sleeve 2S that rises from and is integral with the plunger 26. As shown, such sleeve 1s also exteriorly threaded at its upper end to receive a nut 29 the rod sections. 35 indicates a suction-pipe y secured by a coupling 36 to the lower end of the cylinder 11.

By the construction shown and described it is evident that the provision made for connecting the sections of one of the plunger-rods by right-hand screw-thread means while the sections of the other rod are connected by left-hand screw-thread means serves to eifectually counteract any tendency to separation of the joints of either rod since each'rod is held against rotary movement with respect to the other. For

example, with the parts arranged as shown7 but with the inner plunger-rod having its sections coupled together by right-hand screw-thread means the same as are the sections of the hollow rod, the effect of a movement of suchV inner rod that tended to.

loosen it at its connection with the lower plunger 26 and loosen the connections of itsv several sections would also tend to unscrew the plunger 13 from its connection with the lower end of the outer plunger-rod 15 and said also loosen the connections between the several sections of such rod. 1 Vith the two rods, however, coupled up in4 a reverse manner, as shown, any rotary movement in a direction tending to'unscrew the connections of one rod will causea tightening of the connections ofthe other rod, as will be appreciated when it is borne in mind that the angular portion Vof the inner rod has a perfect sliding it through the correspondingly shaped opening in the upper plunger 13.

' Inasmuch as any tendency to rotary move- -ment on the part of eitherof the rods is thus effectually provided against, it follows that the several packing-.boxes will remain undisturbed and that the packing, that each contains will be at all times held with the desired degree of tightness around and against the yinner reciprocating rod, and thus not only will leaks around vthe jointsV of the sections lthat constitute the outer rod be prevented but the hard grease or other lubricant withwhich such sections are provided will be effectively maintained to furnish the desired lubrication of the inner rod.

While I have described the outer rod sections connected together by right-hand screw-threaded means and the sections of the other rod connected together vby left-Y hand screw-threaded means, it is obvious, of course, that they reverse of such arrangement might be employedit being only necessary in order to accomplish the desired' end that the sections of one rod be screwed together in an opposite manner fromthose of the other rod. By the use of ymy construction by which the hollow pump-rod sections Yl5 are prevented from unscrewing'V from the couplings 20, the packing boxes 21 are held continuously'in fixed position. In this there is no chance that the packing become disturbed or that communication be established between the interiors of adjoining sections 15 aboutthe rod sections 25.

IVhat I claim as my invention and desire 110 to secure by Letters Patent, is-

1. The combination of avpump-cylinder, two reciprocating plungers therein, one above the other, a hollow sectional plungerrod connected with the upper plunger, a

second Vplunger-rod within the hollow plunger-rod and extending-through said upper plunger and connected with the lower plunger, said inner plunger-rod having an angular portion and a cylindrical portion, andV two bearings for said innerkplungerrod, one of said bearings being in the upper plunger and the other being supported between two sections of the `hollow plunger-rod,-one of the bearingsfbeing angular 'and the other cylindrical tocorrespond to Vthe two' diii'erent shapes of thesaid inner plunger-rod. A

2. The combination of a pump-cylinder, two reciprocating plungers therein, one

above the other, a hollow plunger-rod connected with the upper plunger, a second plunger-rod within the hollow plunger-rod and extending through said upper plunger and connected with the lower plunger, said inner plunger-rod having an angular portion and a cylindrical portion, and two bea-rings for said inner plunger-rod, the lower one of said bearings being in the upper plunger and the upper one supported by the hollow plunger-rod, one of the bearings being angular and the other cylindrical to correspond to the two different shapes of the said inner plunger-rod, that one of the bearings through which the cylindrical portion of the inner rod passes comprising a packing-box located adjacent to the joint between two sections of the hollow plunger rod.

3. A deep-well pumping means comprising two reciprocating plungers and a rod for each plunger, one rod being within the other and extending through the upper plunger, means for interlocking said pumping means to prevent independent rotary movement of either of the rods or plungers, and packing-boxes supported at intervals by the outer rod around the inner rod'.

4. A deep-well pumping means comprising two reciprocating plungers and a rod composed of sections for each plunger, one rod being within the other and having an angular portion that passes through and reciprocates in a correspondingly-shaped bearing in the upper plunger and having also a cylindrical portion that reciprocates in another bearing,said other bearing consistingof a packing-box having a flange projecting between adjacent ends of two sections of the outer rod-and screwthreaded means for securing the sections of the two rods together, the screw-threaded means for one rod having a right-hand thread and that for the other rod having a left-hand thread.

5. ln a deep-well pump, the combination with two reciprocating plungers and a rod for each plunger, each rod being formed of a plurality of sections and one rod being within the other and extending through the upper plunger, of a packing-box having a flange projecting between the ends of two adjacent sections of the outer rod, said packing-box forming a bearing for the inner rod, screw-threaded means for securing the sections of each rod together, the screwthreaded means for one rod having a righthand thread and that for the other rod having a left-hand thread, and means for interlocking said rods together to prevent independent rotary movement of either rod.

6. rlhe combination of a hollow pump-rod formed or' a series of sections joined tightly together, a second pump-rod extending through said hollow pump-rod, packing boxes effectually blocking olf the space about said second pump-rod within one hollow pump-rod section from that of the adjacent hollow section, said packing boxes being held firmly in position by the rigid joining oit' said hollow sections, and means for preventing the loosening of the joints of said hollow pump-rod.

7. The combination of a hollow pump-rod formed of a series of sections joined together by screw-threaded couplings, a second pump-rod extending through said hollow pump-rod, packing boxes eii'ectually blocking off the space about said second pump-rod within one hollow pump-rod section from that of the adjacent hollow section, said packing boxes being held firmly in position by the hollow sections screwed tightly into said couplings, and means for preventing the loosening of said couplings on said hollow pump-rod sections.

8. rThe combination of a hollow pumprod formed of a series of sections joined together by screw-threads, a second pumprod extending through said hollow pumprod and also formed of a series of sections joined together by screw-threads, packing boxes effectually blocking oli the space about said second pump rod within one hollow pump-rod section from that of the adjacent hollow pump-rod section, said packing boxesbeing held firmly in position by the screw-threaded joints of said hollow pumprod being maintained in tightened condition, and means for preventing the sections ci? each of said pump-rods from becoming loosened by rotary movement with respect to each other, the screw threads of one pump-rod being right-hand threads and those of the other pump rod being left-hand threads.

JOHN B. SPERRY. 

